Meet Project Donghu, the first open-source motherboard based on the Loongson 3 family of processors.
- Design Lead: Hengrui Zhang (@Harry2005)
- Contributors: @C-zitong, @MingcongBai, @snowpiaoling, @xry111, @yangwenqing, et. al.
- Project Support and Funding: Loongson Hobbyists' Community
This project aims to develop a motherboard design that can serve as an alternative to the Loongson XB612B0_V1.2 motherboard currently available on the market. Like the existing model, this motherboard is equipped with a Loongson 3B6000 processor but features an enhanced core power supply circuit with the potential to support overclocking. It also comes with 4 DDR4 DIMM slots, providing a more flexible upgrade path.
Most notably, the motherboard distinguishes itself by incorporating the IX7012 PCIe 3.0 bridge from Innosilicon, which has a significantly smaller physical footprint and lower power consumption than the Loongson 7A2000.
- Processor: Loongson 3B6000 (soldered)
- Form Factor: μATX (244×244mm)
- Key design goals
- Bolstered core power supply - 7+1 phases (MP2975 + MP85956)
- Alternative bridge chip design based on the low-power InnoSilicon IX7012 bridge chip, with 12 PCIe 4.0 downstream lanes.
- Four DDR4 DIMM slots with support for Registered ECC modules.
- Integrated slot for Wi-Fi module - m.2 NGFF + antenna assembly.
- Southbridge bypass switch for an extra PCIe 4.0 x4 NVMe slot (or PCIe 3.0 x2 as supplied by the southbridge).
Project Donghu is currently a work-in-progress.
- Board Schematics
- PCB Layout (WIP)
- EC Firmware (WIP)
- UEFI Firmware (WIP)
- Manuals and Packaging (WIP)
.
├── docs/ ~ Project documentation
│ └── DATASHEETS.md ~ Datasheet references
├── firmware/ ~ Firmware sources and binaries
├── hwdesign/ ~ Hardware design files
│ ├── pcb/ ~ PCB design files
│ └── schematics/ ~ Schematics
├── support/ ~ End-user-facing documentation
├── COPYING ~ License document (CC BY-SA 4.0)
├── README.md ~ Read-me document (English)
└── README.zh-cn.md ~ Read-me document (Simplified Chinese)
Project Donghu plans on using the reference Loongson UEFI firmware (LsFwSdk), which is not open-source (sadly... yet?). However, there is a possibility that we would release a U-Boot-based firmware solution for this board, enabling a open source firmware-to-boot stage, save for key DDR/PHY binaries.
All materials found in this repository (unless otherwise specified) are all licensed under the Creative Commons Attribution-ShareAlike 4.0 International license.